Reviews by patients who have Tooth Pain and take Zinc either as part of daily diet or as method of treatment. Positive and negative experiences from patients with Tooth Pain that take Zinc
1 Red or black colored stool may be a sign of bleeding in the GI tract (from the esophagus, stomach, small intestine or colon) and should not be ignored.  When stool color changes, what tests need to be done depend upon depends upon what cause is suspected for the stool color change.
Black stool can indicate bleedingâanywhere from your esophagus to the middle of your small intestineâand is caused by the breakdown of iron in your blood. Stool that is black because of internal bleeding usually has a tar-like consistency and smells particularly bad.